Approximately Unbiased Estimator For Non Normal Process Capability Index Cnpk
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Approximately Unbiased Estimator For Non Normal Process Capability Index Cnpk
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Author : W. L. Pearn
language : en
Publisher:
Release Date : 2014
Approximately Unbiased Estimator For Non Normal Process Capability Index Cnpk written by W. L. Pearn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Bootstrap categories.
Process capability indices (PCIs) have been extensively used to evaluate and measure whether the process meets the specifications and they provide quality assurance and guide a principal for quality improvement. The index Cpk is the most popular index and is widely used in the manufacturing industry for manufacturing yield evaluation. However, typical evaluations of Cpk depend heavily on the assumption of normal variability. When the underlying distributions are non-normal, the capability evaluations are highly unreliable. In the paper, we apply four various bootstrap methods to construct lower confidence bounds of CNpk for non-normal processes. We also propose an approximately unbiased estimator of CNpk for the non-normal processes. Comparisons among the four bootstrap methods with different estimators are provided.
Estimation Of A Modified Capability Index For Non Normal Distributions
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Author : W. L. Pearn
language : en
Publisher:
Release Date : 2016
Estimation Of A Modified Capability Index For Non Normal Distributions written by W. L. Pearn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Curve fitting categories.
Process capability indices (PCIs), which are very important in quality control have been one of a numerical measure index in manufacturing processes. Index Cpk is the most popular one used in the manufacturing industry. It is applied under the assumption that the processes are normally distributed. In real-world applications, non-normal processes may occur in industries, and the index CNpk has been proposed for non-normal processes in which its exact sampling distribution is mathematically intractable. Quality practitioners commonly use the existing NCPPM (non-conformities in parts per million) table of Cpk to obtain process yields. However, the table could not be applied directly via the value of index CNpk. For the consistency of NCPPM mapping, we propose procedures to obtain the modified index C*Npk and its approximately unbiased estimator C?*Npk for three non-normal distributions, involving Log-normal, Gamma, and Weibull distributions. The values of modified index C*Npk could be used to inquire the existing popular NCPPM table of Cpk. In addition, four bootstrap methods were used to construct the lower confidence bounds of the index C*Npk, which are useful to the practitioners for making reliable decisions regarding process performance based on process yield.
Performance Analysis Of The Approximately Unbiased Estimator Of Process Capability Index Cpk
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Author :
language : en
Publisher:
Release Date : 2018
Performance Analysis Of The Approximately Unbiased Estimator Of Process Capability Index Cpk written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Developing Structured Procedural And Methodological Engineering Designs
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Author : Yohannes Yebabe Tesfay
language : en
Publisher: Springer Nature
Release Date : 2021-04-15
Developing Structured Procedural And Methodological Engineering Designs written by Yohannes Yebabe Tesfay and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-15 with Technology & Engineering categories.
This book is designed to assist industrial engineers and production managers in developing procedural and methodological engineering tools to meet industrial standards and mitigate engineering and production challenges. It offers practitioners expert guidance on how to implement adequate statistical process control (SPC), which takes account of the capability to ensure a stable process and then regulate if variations take place due to variables other than a random variation. Powerful engineering models of new product introduction (NPI), continuous improvement (CI), and the eight disciplines (8D) model of problem solving techniques are explained. The final three chapters introduce new methodological models in operations research (OR) and their applications in engineering, including the hyper-hybrid coordination for process effectiveness and production efficiency, and the Kraljic-Tesfay portfolio matrix of industrial buying.
Performance Analysis Of The Approximately Unbiased Estimator Of Process Capability Index Cpk
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Author :
language : en
Publisher:
Release Date : 2018
Performance Analysis Of The Approximately Unbiased Estimator Of Process Capability Index Cpk written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
An Approximately Unbiased Estimator Of Process Capability Index Cpk
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Author :
language : en
Publisher:
Release Date : 2016
An Approximately Unbiased Estimator Of Process Capability Index Cpk written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
An Approximately Unbiased Estimator Of Process Capability Index Spk
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Author :
language : en
Publisher:
Release Date : 2016
An Approximately Unbiased Estimator Of Process Capability Index Spk written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
An Approximately Unbiased Estimator Of Process Capability Index Cpm
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Author :
language : en
Publisher:
Release Date : 2016
An Approximately Unbiased Estimator Of Process Capability Index Cpm written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Performance Evaluation Of Non Normal Process Capability Index Cnpk Under Lognormal Distribution
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Author :
language : en
Publisher:
Release Date : 2021
Performance Evaluation Of Non Normal Process Capability Index Cnpk Under Lognormal Distribution written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Estimating Process Capability Indices For Non Normal Process Distributions
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Author : Peter Binh Thai Dinh
language : en
Publisher:
Release Date : 1998
Estimating Process Capability Indices For Non Normal Process Distributions written by Peter Binh Thai Dinh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Process control categories.
Measures process capabilities for non-normal distributions using various statistical concepts, addresses the validity of the normality assumption, and focuses on the area of unilateral tolerance and dimensioning.